frequent sudden reboot, sometimes system hanging

Asked by Erik Zijlstra

In October 2021 one of my three NUC's suddenly stopped after having performed flawlessly since January 2020. I had it repaired under warranty and it came back with a new motherboard. I put in the memory and drives. All seemed fine, but now it randomly reboots some time after I stop using it actively. When I come back some times it resumes normally, some times it appears to have rebooted or doesn't respond to mouse or keyboard activity and I have to force a hard shutdown. Some times the restart presents a GRUB menu, some times it just starts up normally.
In the system journal there is a BERT fatal failure reported in some cases, but not every time. [Hardware Error]: section type: unknown, 81212a96-09ed-4996-9471-8d729c8e69ed. There seem to be more errors in the journal, but I need guidance to make sense of these messages.

I wander whether the hardware is not good or is there some kind of incompatibility as the new motherboard is of a newer production date (5/2020) than the old one (11/2019).

I hope someone can help me find out what is wrong and how to fix it.

I am running Linux Mint on Ubuntu 18.04. Hardware is a NUC8BEH.
Linux version 4.15.0-162-generic (buildd@lcy01-amd64-007) (gcc version 7.5.0 (Ubuntu 7.5.0-3ubuntu1~18.04)) #170-Ubuntu SMP Mon Oct 18 11:38:05 UTC 2021 (Ubuntu 4.15.0-162.170-generic 4.15.18)

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Manfred Hampl (m-hampl) said :

"I am running Linux Mint"

Manfred Hampl suggests this article as an answer to your question:
FAQ #3041: “No support for Linux Mint”.

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Erik Zijlstra (ezijlstra) said :

Why offering this "solution". The system is largely Ubuntu, is not it? Certainly in the kernel where the software meets the hardware. That is where I guess the problem is located.
Almost every update I install comes from the Ubuntu repo.
Or am I wrong? I would be glad to learn something.

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actionparsnip (andrew-woodhead666) said :

Mint is not supported here or by Canonical. Mint's support community and forums are entirely separate from Ubuntu's

I suggest you post on the Mint forum here

There are distribution agnostic forums. This isn't one of them. None of the "Ubuntu based" distributions are supported here

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Erik Zijlstra (ezijlstra) said :

Most forums in the open source world are populated by people who like to help each other.
This is my first experience on this forum, but it feels like entering a religious battle ground.
"You are not one of us, please go to the other church."

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Manfred Hampl (m-hampl) said :

It is true that Linux Mint is built on top of Ubuntu, but there are several additions and modifications to the Ubuntu-provided software by Linux Mint. We do not know anything about those.
If we now try to provide support for an Ubuntu program for which there are modifications done in Linux Mint, then this will fail and will not help you at all.
So please ask at the support for your operating system.

You won't ask your car manufacturer if you have a problem with your bicycle, although both have wheels, will you?

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actionparsnip (andrew-woodhead666) said :

It's the rule of this particular forum. Mint has its own. There are forums that support any and all distributions too.

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Erik Zijlstra (ezijlstra) said :

Wrong discussion; not helpful.
Case closed, but not solved.

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